Pigment dye and process of preparing it



Patented Apr, 14,1931

4 1 terials have proved to u-mms'r-A E' PATENT omen emons mm, x. 1,4 coarom'rron or nnmwm Hebrawlnm Application filed Augustin, 1927, Serial Ho;212,1fl6, and in Germany September 11, 1920. -tity of dilute hydrochloric acid. The dye Our present invention relatesto pigment dyes and process ofpreparing them.

' We have found-that dye stuffs containing be pigment= one or several acid groups can ed in an excellent manner by addingto the solutions of heir salts a salt of an organic base containingjthe following group;

w e-1K2 wherein X and X stand for hydrogen, alkyl or' or X and X together =C-C- said organic base dissolved in water having a suflicientlygreatbasicity for a stable'salt' which is no nger or only d-iflicnltly capableof being hydrolized and which renders the dyestuffs insoluble or sparingly soluble in water. As-such basicorganic mabe particularly useful the die clohelxylamine', trisubstituted melamines or instance of the following formula gluon,

- The same pigments can also be obtained by causing the free dyestufi acids to react with the free bases, if necessary;

precipitating them from their alcoholic solumeans ofagents such as for instance tion by water, dyes are or by evaporation. Said pigment insoluble or difiicultly soluble in water but soluble in many organic solvents.

' our invention; but they, are not The following examples-serve to illustrate intended to limit it thereto; the parts are parts by weight:

(1) 42 parts of sodium-l-aminOA-anilido- 1 anthraquinone-2sulfonate are dissolved in v 1000 parts of water, and to this solution is added at about C. a solution of 18,5 parts of dicyclohexylamine in the calculated quan- KBZNZLEIN, CHBIBTOPE RAB-THANK,

GERMANY, ABSIGNOBS '10 GENERAL ANILI-NE WORKS, INC,

rxenm nan Aim raocnss or rename 1 for g which soon separates is filtered by suctionin a suitable, solvent as'for instance concentrated or aque- AND mm new, or Reflex on-ran body of the following formula:

and dried. It forms. blue' powder dissolvin concentrated sulfuric acid to an almost colorless solution which on addition of formaldehyde assumes a green, boric acid inthe heat a' blue color. insoluble in water, soliible in alcohol, acetone,

v benzyl alcohol, cyclohexanone and cyclohexanol to a blue solution. 2 Pa azosalicy'late are dissolved in about 2000 parts of water, and to this solution are added at roometemperature about 35 parts of'quinoline hydrochloride. dissolved in water. The yellow precipitate is filtered by suction and dried. Itconstitutes an'oran der dissolving in concentrate acetone and benzyl alcohol to a reddish-yelor new Yoax,

on addition of. It is ofsodium-para-nitrophenyle-yellow pow- 4 sulfuric acid,

low, in alcohol and benzene to ayellow solution. It has following formula:

dyestufi of 115 01- (3) To 20 parts of the lowing formula:

cm solNa' I, p. mk Q 299m- OON:

are ahded in an aqueous solution at about ioa 10 C. to 20 C. 10 arts of 'ethenyl-v .phenylenediamine of the ollowing formu a:

i an i4 These pigments as such or after being mechanically mixed with one of the usual substrata as for instance aluminum hydroxide,

heavy spar, blanc fix (precipitated barium sulphate) or a mixture thereof may be rubbed on with varnish" and printed, or rubbed on blanc fix, or mixtures thereo with linseed oil and spread, or brushed on with an aqueous binding agent, and thus yield very intense, clear shades of very good fastness to light.

The precipitation of the sodium salt of the dyestufl by means of a salt of an organic base can of course also be effected in the presence of substrata for instance of the above named aluminum hydroxide heavy spar,

Instead of the above-indicated dyestuffs there may also be used other dyestuffs for producing pigment-dyes in the afore-describedmanner, for instance 1-amino-4- araacetanilido-2-anthraquinonesulfonic acld of the following formula:

SOINB NH 0 aHiNHC OCH:

1.4-dihydroxy-5.8-di-para-toluidoanthraquinonedisulfonic acid; 1.5-dihydroxy-4.8-dipara toluidoanthraquinonedisulfomc acid; 1. l-diamidoanthraqumone-Q-sulfonic acid; l-hydroxylpara toluido-anthraquinon esul-. fonic acid 1.5-di-para-toluidoanthraquinone-' disulfonic acid; anthrapyrimidine-4-paratoluidosulfonic acid of the following formula:

methylanthrapyridone-4-arylsulfonic acids NHCoHICEBOgNB of the following formula:

CK NOH oiro . Nnoamcmsoma 1.4 diaminoanthraquinone 2 phenoxysulfonic acid of the following formula:

i N E19 I C O I or the like. r

Instead of the above-named acid anthraquinone-dyestufi's there 'may also be used other dyestuffs having acid groups, as for instance the dyestufls of the following formulasz' or the acid triphenylmethan dyestuif; Pat-- ent Blue A, Whose constitution is of the following formula:

or the dyestuif'obtainable by the action of ortho -toluidine upon fluoresceinchloride and sulfonation of the reaction product. It

' has the following formula rho-mo n: N-can-cm dOaNa i meow The organic bases serving as precipitating agents and yielding precipitates which are insoluble or sparingly soluble in water, are selected in eac case according to the particular circumstances.

a We claim: I

1. The process of preparing pigment dyes which comprises treating an organic dyestuif containing acid salt+forming grou s in the resence of a'solvent with a cyclic ase containing the following group:

which comprises treating an ant wherein the grouping -C-O forms a art of a cyclic radical and wherein X amfX stand for hydrogen, alkyl .or --C-C, or X and X together for =CC.

2. The process of preparing pigment dyes which comprises treating an organic dyestufl containing sulfo groups in the presence of a 'solventwlth a cyc icbase cont ining the following group:

wherein the grouping forms apart of a cyclic radical and wherein X and X X and X toget er for =OvG-.

3. The process of preparing 'pigxment dyes raquinone dyestufi containing acid salt-forming oups in thepresence of wherein the grouping -G-C -iforms v f of a cyclic radical and wherein X an X stand forhydro en, alkyl .or" X and X toget er for ='GG v. 4. I The process of preparing pi ment dyes which compn sestreating an ant raquinone j, 65 dyestufi' contaixjaing 'sulfo. groups in the presence of asolvent which acyclic base containingthe followinggrou i Q -o-o-N 'whe'reinthe grouping forms a part of a cyclic radical and wherein X and X stand for. hydro en, alkyl or or X and X toget er. for =CG"-. The process ofpreparing a pigment dye whichcomp'rises treating 1-amino-4-ani1idoa solvent with a cychc base containing the following group:

' salts formed on the one s1 dyestufi containing acid'salt-forming groups arithraquinone-Q-sulfonic acid in the presence of a solvent with dicyclo-hexylamine.

6. The process of preparing pigment dyes which comprises treating a salt of an organic d estufi containing acid salt-forming groups a dlssolved in water with a salt-of a cyc base containing the following group:

wherein the grouping -C-C- forms a art of a cyclic radical and wherein X ancFX stand for hydro en, alkyl or GC,-', or

X and X toget er for =GC- 7. The process of preparing pigment dyes which comprises treating a salt of an organic diestufi containing sulfo groups dissolved in water-with a salt of a cyclic base contain ing the following group:

wherein the grouping -C-C- forms a part of a cyclic radical and wherein X and X stand for hydrogen, alkyl or -GC-, or X and X together for =CC-.'

8. The process of preparing pigment dyes which comprises treating a salt of an anthraquinone dyestufi containing acid salt-forming groups dissolved in water with a salt of a cyclic v -c-o N i v wherein thegrouping C-O- forms a dpart of a cyclic radical and wherein iii an X stand for hydrogen, alkyl or -C-C-, or X and X together for =C C-.

9. The process of preparmg pigment dyes V which comprises treating a salt of an anthraquinone dyestufi containin s'ulfo groups discontaining. the following group:

Y wherein the gr uping forms, a (part of acyclic radical'and wherein X an X 7 stand for hydrogen, alkylor G-G-,

10. The process of preparing a pigment dye which comprises treating sodium-l amino-4 anilidoanthraquinone 2 sulfonate dissolved inwater with dicyclohexylaminehydrochloride.

11. As new products pigments dyes being e'jrom an organic and on the other side from a cyclic base containing the following group:

, I p v x; wherein the grouping -C-C forms a part base containing the following group solved'in water with a sa t'of a cyclic base of acyclic radlcal a'nd wherein X and X stand for hydrogen, alkyl or -.-Q O or X and X together for =OC and having a basicity suflicient for the formation of a stable salt, said pigment dyes being soluble in a great number of organic-solvents and 5 most of the pigment dyes yielding clear tints of good fastness to light. 12. As' a new product a pigment dye of the formula:

Ha HI 9 l0 H H: H H.

being a blue powder insoluble in water, s01u-- ble in alcohol, acetone, benzyl-alcohol, cyclohexanone and cyclohexanol to a blue solution izlnclll yielding a clear tint of great 'fastness to .g t o 13. As a, new product, a pigment dye of the following probable formula:

being an orange yellow powder, dissolving in concentrated sulfuric acid, acetone and benzyl-alcohol to a reddish-yellow, in alcohol and benzene to a. yellow solution; In testimony whereof, we afiix our signa tures.

, GEORG KRANZLEIN. v DR. CHRISTOPH HARTMANN. ALBIN HARDT.- 

